As a new version is implemented every nine months or so, the code is continuously evolving to get the best out of the supercomputers, to assimilate data from new observation systems and to improve the components of the forecast model. A mass flux scheme based on a moisture convergence closure processes phenomena associated with the deep convection (transport, clouds, precipitations, etc). Ces cartes présentent les prévisions du modèle global ARPEGE produit par Météo-France toutes les 6h.

Model forecasts are interpolated on a five horizontal regular lat/lon grids, with one 0.1°x0.1° grid over the Europe-Atlantic domain and one 0.5°x0.5° grid over the Earth, and on several vertical level types (pressure, height, isoPV, etc).Finally, it is worth mentioning that the operational short range ensemble weather forecasting, PEARP (Prevision d’Ensemble ARPege) is also based on the ARPEGE model.

Monthly climatology files are used to describe physiographical properties of the soil, the vegetation , ozone and aerosols.The influence of physical processes (radiation, microphysics, surface processes) and the subgrid transport (turbulence, convection, gravity waves) on the evolution of the model prognostic variables are represented by the physics parametrizations. '9I ���XF*r�}���Qs�E5E(�8j����_���p~z�iт�gA%��l�A�� �F�lB�vK&d�Xl�U�hm��|��&���x������l�7�nC�I-����i���J֥��N��������

�~ ��t��#>�K Sie wechseln zurück zum ersten verfügbaren … Several phenomena linked with the subgrid orography, such as gravity waves, their reflection and trapping as well as upstream blocking are taken into account. <> �2�"TO�)l!��P�,A����M���4��剽�}H�T� B �7�p0�0�x��d��5&R���+U��v'V���������E�VH�3��}�GD�G��= ‰�FH%q���V3 a�""��`kka�J��T�T.5A�V��^70����%�]���_�������i˼�z(���]��azL���δ� 2 0 obj

The numerical model ARPEGE is a global and spectral general circulation model. Ces cartes présentent les données du modèle ARPEGE 0.5° de Météo-France. Echéance max. Its time step is of 360 seconds.

The lifespan of the ARPEGE model goes well beyond any of its predecessors, being in use for more than 23 years now, against the old record of 8 years and 7 months for the Péridot model.The initial conditions of the ARPEGE model are based on a 4 dimensional variational assimilation (4D-Var) that incorporates a very large and varied amount of conventional observations (radio sounding, airplane measurements, ground stations, ships, buoys, etc) and also from remote sensing (ATOVS, SSMI/S, AIRS, IASI, CRIS, ATMS, SEVIRI, GPS sol, GPS satellite, SATOB, diffusiomètres, etc...).ARPEGE uses a set of primitive equations with a triangular spectral truncation on the horizontal, with a variable horizontal resolution, with a finite elements representation on the vertical and a “sigma-pressure” hybrid vertical coordinate. Info à propos du modèle : This system is fully integrated within the ARPEGE-IFS software that was conceived, developed and maintained in collaboration with ECMWF. It has 105 vertical levels, with the first level at 10m above the surface and an upper level at around 70km. Its climate version (ARPEGE-Climate) has been developed in the 90s (Déqué et al., 1994). The ALADIN and AROME regional models use a Lambert conformal projection with a bi-Fourier spectral representation and elliptical truncation.

�~����`-�s�fq4�.Wʹ&Z�8�z2&�b�"��٪%�ߴ������.��� CPTEC Die ausgewählte Parameter und Region ist verfügbar, aber nicht für 2020-08-15, 21:00. Microphysical processes linked to resolved precipitations such as auto-convection, collection, evaporation, sublimation, melting and sedimentation are explicitly represented.The “force-restore” ISBA surface scheme includes several important physical processes taking place at the soil-vegetation-atmosphere interface and in the superficial soil (heat and water diffusion in the soil, run-off, frozen soil, snow melting, etc) so as to assess the momentum, heat and humidity fluxes on continental surfaces. The horizontal resolution of the ARPEGE model is around 7.5km over France and 37km over the Antipodes.

ARPEGE uses a set of primitive equations with a triangular spectral truncation on the horizontal, with a variable horizontal resolution, with a finite elements representation on the vertical and a “sigma-pressure” hybrid vertical coordinate.

Ces cartes présentent les prévisions du modèle global ARPEGE produit par Météo-France toutes les 6h. Les cartes des zooms sont disponibles directement lors de la mise à jour du modèle (voir la couleur des diodes). The surface and the upper soil layer conditions are characterized by several prognostic variables (temperature, liquid and solid water content, etc). /bH@�"4&ug{a.�f�wf� ARPEGE forecasts are used as lateral boundary conditions for the high resolution AROME and ALADIN limited area models. The transport in the atmospheric boundary layer rests on a diffusion scheme whose transfer coefficients are dependent on the turbulent kinetic energy (TKE) and a mixing length, and on a mass flux shallow convection scheme. x��\I�#��ׯ�6 M��J)16�a������=�=��`���-�ef�����nLAU*3��}�%C%vr���>�����ܷ���&���o7�n����ǭ�. �S=���x)����Z>�� Radiative exchanges in the atmosphere (clear sky, clouds, Ozone, aerosols) and at the surface are computed every three hours, but separately for the solar (0.2 to 4mm) and the thermal (4 to 100mm) parts.

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